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  • Books
  • Articles  (3)
  • American Institute of Physics (AIP)  (3)
  • 1990-1994  (3)
  • 1992  (3)
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  • Books
  • Articles  (3)
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Years
  • 1990-1994  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Beam divergence effects on nonlinear frequency mixing (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 1091-1101 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of the beam divergence of the input pump laser beams on the nonlinear frequency mixing process in a dielectric medium is discussed. The divergent laser beams have finite angular spreads so that all of the interactions between the two input beams can never satisfy the phase-matching condition exactly. A numerical model is developed to investigate the effects of input beam divergence on conversion efficiency. The angular spread of each of the input beams is represented by a set of plane waves having a distribution of propagation directions. Each of the plane-wave components from one input beam is allowed to interact with all the plane-wave components of the second input beam. This model is applicable to processes such as sum frequency generation, difference frequency generation, and optical parametric amplification. Second-harmonic generations as a special case of sum frequency generation is used as an example in the numerical studies. Results indicate that the conversion efficiency is dependent on the amount of beam divergence, the input intensity, and the length of the nonlinear medium. These parameters must be optimized with respect to one another to maximize the conversion. The optimization is especially critical in high-power systems where high conversion efficiency is sought.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351272
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    AlGaAs/GaAs-based triangular-shaped ring ridge lasers (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 1658-1660 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Triangular-shaped ring ridge lasers (ridge trilasers) have been fabricated using quantum-well semiconductor laser material. The spectra of these ridge trilasers show single-wavelength operation above threshold confirming traveling-wave behavior in these lasers. Unidirectional operation is reported based on asymmetry between the clockwise and counterclockwise directions, in contrast to conventional unidirectional operation in ring lasers based on magnetic techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107228
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Potential well formation by injection of electrons with various energy distributions into a sphere or a slab (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 4140-4152 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The details of the potential well structure produced by the injection of electrons from high-energy electron guns is studied as a function of the energy, velocity spread, and density of injected electrons. The effect of geometry, slab versus sphere, is also calculated. A motivation for the study is that some devices that attempt to produce fusion reactions from the acceleration of ions by an electric potential use energetic injected electrons to produce the potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860321
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    Paper (German National Licenses)
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